welcome to the cnn fu"cnn newsn" strong words in the fight against the radical islam group, isis. a cancer that must be stamped out. u.s. secretary of state john kerry is demanding a bigger response from the world as the uk raises its threat level. where the u.s. stands, coming up. >>> plus, we could be about a week away from seeing a brand-new iphone. why the leaked designs are already creating a buzz, and not in a good way. >>> and college football is back this weekend. we take a look at the biggest games and also the brand-new playoff structure that starts this year. >>> we'll get to those stories in a moment. but first, the increasingly tense standoff over ukraine. european leaders describe the crisis as dramatic, serious, and possibly headed to a point of no return. here's what's happening on the ground right now. a british government source tells cnn, between 4,000 and 5,000 russian troops are now fighting in eastern ukraine. the source says 20,000 additional troops are on the border. european union leaders are meeting in belgium to discuss the situation. their response coul